Controller for switched reluctance motor
US5532567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1995 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Mar 28, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/0925
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Suppression of a peak noise level as may be caused by a resonance when an SR motor is driven is intended. An offset is intentionally provided between a position for a maximum drive efficiency where the energization is to be switched and a position where the energization is actually switched. Such offsets s1, s2, s3, . . . are generated in terms of random numbers, producing a fluctuation in the frequency of the oscillations which result. The fluctuation in the frequency is effective to prevent the occurrence of a resonance. In order to avoid a resulting reduction in the drive efficiency, the magnitude of such offsets are limited to lie within a permissible shift angle, which is in turn determined in terms of the prevailing torque and number of revolutions, by reference to a map.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.